I'm a cool dude now!
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=141018
Printed Date: 31 Dec 2025 at 8:39pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: I'm a cool dude now!
Posted By: Eldon (WA)
Subject: I'm a cool dude now!
Date Posted: 01 Aug 2017 at 10:55pm
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Mechanic around the corner fixed the AC in my 6080 today....just needed recharged and he bypassed the switch in the pump. Anyone know why they used 2 pressure switches? Make me feel bad I didn't look into it 5 years ago when I got the tractor. Couldn't wait for a new gasket for the cab lid, so went to HD and bought 20' of 1/2" round weatherstripping and tucked it under the outside edge as I put the bolts back in. Seems to work fine. Anyone know the NAPA number for the cab filter? Now I just have to switch out the rear tires/wheels and should be set to go bush hoggin in the heat! ------------- ALLIS EXPRESS! This year: |
Replies:
Posted By: wayneIA
Date Posted: 02 Aug 2017 at 12:25am
| One pressure switch is in the high pressure side of the AC system to prevent blowing the pump up if the filter drier or expansion valve get plugged. The second switch is in the low pressure side to prevent the compressor from running if there isn't enough refrigerant in the system to prevent the pump from losing it's oil and seizing along with just simply running with no productivity due to the lack of refrigerant. |
Posted By: Mikez
Date Posted: 02 Aug 2017 at 12:38am
| Which switch did he bypass. |
Posted By: shameless dude
Date Posted: 02 Aug 2017 at 1:06am
| hot weather is about over with now! |
Posted By: darrel in ND
Date Posted: 02 Aug 2017 at 9:29am
| Getting soft in your old age, eh? Needing AC and all. I don't blame you a bit. Darrel |
Posted By: Brian Jasper co. Ia
Date Posted: 02 Aug 2017 at 1:10pm
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You absolutely want the switch on the high side working. A blockage after the condenser will make both sides low pressure wise. The high pressure limit is there to save you from blowing a high side hose in the event the condenser gets full of chaff, weeds, etc or the fan clutch free wheels. It depends on which type of switch the low side is. If it's a thermostatic type or a cycling clutch type you need them working as well. Without either of them you will have the evaporator freeze the condensation and you won't have much for air flow in the cab. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: SteveM C/IL
Date Posted: 02 Aug 2017 at 1:18pm
| ....soooo....these switches are there for a reason??? LOL! |
Posted By: Dipstick In
Date Posted: 02 Aug 2017 at 3:27pm
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Yup! ------------- You don't really have to be smart if you know who is! |
Posted By: Brian Jasper co. Ia
Date Posted: 02 Aug 2017 at 4:24pm
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They sure are. If I was to guess which one is bypassed I'd bet it is the high side. Keep the condenser and radiator good and clean. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: Eldon (WA)
Date Posted: 02 Aug 2017 at 5:08pm
Yes it was the high side located in the pump. Where could I get a new one and what does it take to replace it? ------------- ALLIS EXPRESS! This year: |
Brian Jasper co. Ia wrote:Posted By: Bill Long
Date Posted: 02 Aug 2017 at 7:52pm
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Eldon, I understand you have some record highs in your area. I can fully understand the need for Air Conditioning. Hope it works well. Enjoy one of the modern pleasures of up to date farming. Good Luck! Bill Long |
Posted By: Mikez
Date Posted: 02 Aug 2017 at 10:34pm
| I got the high side switch from agco eldon. Then go back to your buddy and have him suck it out and it's real easy to change out. If its the same compressor as mine. |
Posted By: Eldon (WA)
Date Posted: 02 Aug 2017 at 11:00pm
Yes Bill we are going for a record of 90+ days....hot, dry and dirty mowing these days....I am still using the 175D in the mornings, but need AC in the afternoon. ------------- ALLIS EXPRESS! This year: |
Posted By: Eldon (WA)
Date Posted: 02 Aug 2017 at 11:00pm
I looked a little closer at it tonight, looks like a snap ring holding it in?? ------------- ALLIS EXPRESS! This year: |
Posted By: shameless dude
Date Posted: 03 Aug 2017 at 12:52am
| Eldon is gonna be nippin out! LOL |
Posted By: SteveM C/IL
Date Posted: 03 Aug 2017 at 6:35am
| ...snap ring holds it and has an O-ring around it. |
Posted By: Mikez
Date Posted: 03 Aug 2017 at 7:16am
| Yup mine came with new oring and may have come with snap ring to. Your A C guy should have some oil that goes in the system, oil it up when you put it in |
Posted By: darrel in ND
Date Posted: 03 Aug 2017 at 8:35am
Well Bill. I bet that when you and your Dad were selling B's by the hundreds, air conditioning wasn't a popular option; just wide open air. LOL! Darrel |
Posted By: Gerald J.
Date Posted: 03 Aug 2017 at 9:46am
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The switch is operated by refrigerant pressure, so the refrigerant will have to be removed before changing the switch and then the refrigerant will have to be put back in. Gerald J. |
Posted By: Bill Long
Date Posted: 03 Aug 2017 at 11:20am
Darrel, Remember in my day we did not have air conditioning. In the home, on the vehicles, and especially not on the tractors. You know, when I went out on a hot day I always asked if the unit could move. If it could we moved it to the shade. Especially the combines. One of my toughest jobs - and I got it since I was the youngest and smallest - was crawling inside a combine, especially with wong barley barbs - to unplug something in the hot sun. Survived, but now really appreciate air conditioning. Good Luck! Bill Long
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Posted By: HudCo
Date Posted: 03 Aug 2017 at 3:47pm
| some preasure switches do have a valve core behind them so that you can change them out with out dischargeing the system probley not on that tractor but a lot of autos do |
Posted By: Brian Jasper co. Ia
Date Posted: 04 Aug 2017 at 1:05pm
------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: Eldon (WA)
Date Posted: 05 Aug 2017 at 11:28am
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Got the seal "kit" for the cab top yesterday...kinda disappointed as all it is is a roll of weatherstripping I could have gotten at the hardware store.... ------------- ALLIS EXPRESS! This year: |